Materials Literature
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Constant pressure and temperature molecular dynamics techniques have been employed to investigate the changes in structure and volumes of two globular proteins, superoxide dismutase and lysozyme, under pressure. Compression (the relative changes in the proteins’ volumes), computed with the Voronoi technique, is closel…
We examine nonequilibrium features of collapse behavior in model polymers with competing crystallization and glass transitions using extensive molecular dynamics simulations. By comparing to "colloidal" systems with no covalent bonds but the same non-bonded interactions, we find three principal results: (i) Tangent-sp…
La synthese de nanoparticules de silice est classiquement developpee en milieu protique (alcool et/ou eau), excluant l’association directe avec des methodes ou des composes utilises en milieu apolaire (chimie organometallique, polymeres). La premiere partie de cet ouvrage introduit une methode originale de synthese de…
Polyampholyte microspheres with pH and salt concentration sensitive behaviors were prepared by acrylamide(AM),acryloylxyethyl trimethyl ammonium chloride(DAC) and methacrylic acid(MAA) in ethanol.The shape and conformation of microspheres were determined by transmission electron microscope and infrared spectroscopy,re…
Carbon fibers have been used as additional reinforcing fibers to improve the mechanical and tribologicalproperties of phenolic resin-based ceramic-carbon composites. The composites comprising ceramicparticulates such as Silicon carbide, Boron carbide of 1-30 micron size as reinforcement and phenolic resinas matrix car…
Composites, generally, consist of two phase i.e. matrix and reinforcement. Here in this work additionalphase in terms of micro/nano particles was added in the fiber reinforced ceramic matrix composites andits effect on the final properties of composites was studied. Composites were prepared using sol derivedfrom Tetra…
Organically modified nanoclay (cation exchange capacity of 135 to 145 meq/100 g) was used as nanophase reinforcement for fabrication of nylon-6 nanocomposites. The thickness of clay platelets varied form 1.2 nm to 1.3 nm with 3.485 nm as d-spacing. Nylon 6/nanoclay composites were fabricated with loading of 2.5, 5.0 a…
A Festschrift dedicated to John Davies Building upon the successful first meeting in 2006 at Playa del Carmen, Mexico in December 2006, and the second one at Crete, Greece in September 2008, the th...
A simple and dexterous in situ method was introduced to load CdS nanocrystals into organofunctionalized mesoporous, which used an ion-exchange method. The products were extensively characterized by combined spectroscopic methods. X- ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) dem…
Graphene is a material with rapidly growing interest. It consists of flat monolayer of carbon atoms tightly packed into a two-dimensional (2D) honeycomb lattice and is basic building block for all graphitic materials. Interest in Graphene is because of its excellent mechanical, electrical, thermal, optical properties…
The leaching rate of 137Cs from spent mix bead (anion and cation) exchange resins in a cement-bentonite matrix has been studied. Transport phenomena involved in the leaching of a radioactive material from a cement-bentonite matrix are investigated using three methods based on theoretical equations. These are: the diff…
In the title compound, [Pt(CH(3))(3)I(C(12)H(12)N(2))], the Pt(IV) atom is six-coordinated in a slightly distorted octa-hedral configuration with one CH(3) group and the I atom forming a near perpendicular axis relative to the square plane formed by the bipyridine ligand and the two remaining CH(3) groups. The CH(3) g…
Neutron-induced reaction rate depth profiles inside concrete shield irradiated by intermediate energy neutron were calculated using a Monte-Carlo code and compared with an experiment. An irradiation field of intermediate neutron produced in the forward direction from a thick (stopping length) target bombarded by 400 M…
Copper (Cu) is commonly used as metallization for a wide range of microelectronic devices. Typically, organic circuit boards as well as ceramic and glass-ceramic substrates use galvanic deposited Cu films for this purpose. However, due to a thickness of several microns the lateral resolution in the μm-region being req…
Thermoelectric modules convert thermal energy into electrical energy and vice versa. At present bismuth telluride is the most widely commercial used material for thermoelectric energy conversion. There are many applications where bismuth telluride modules are installed, mainly for refrigeration. However, bismuth tellu…
Cette these s'inscrit dans le projet optique digital porte par la societe Essilor, leader mondial dans le domaine de l'optique ophtalmique. La collaboration entre le laboratoire Charles Coulomb et Essilor a donne naissance a une nouvelle generation de systemes optiques apposes directement sur le verre ophtalmique. Ce…
In diaphragm-based micromachined calorimetric flow sensors, the convective heat transfer through the test fluid competes with the spurious heat shunt induced by the thin-film diaphragm where the heater and the temperature sensors are embedded. Therefore, accurate knowledge of the thermal transport properties (thermal…
In this article, we report a spontaneous nanotube formation through mixing two simple, achiral chemicals, dodecyltrimethylammonium bromide (DTAB), and 1-phenylazo-2-naphthol-6,8-disulfonic acid disodium salt (Orange G) in aqueous solution. Nanotubes with outer diameter of about 50 to 100 nm and length of several micro…
A model approach is presented here to obtain sorption isotherms that are connected with a low cost breakthrough analysis for dry desulphurization of flue gas in a fluidized bed reactor. Experiments were conducted at different temperatures (600–900°C) providing constant feedstock concentration (0.6% SO2). The fluidizin…
Depsipeptides are peptide-like polymers consisting of amino acids and hydroxy acids, and are expected to be new functional materials for drug-delivery systems and polymer science. In our previous study, D-alanyl-D-lactate, a type of depsipeptide, was enzymatically synthesized using D-alanine-D-alanine ligase from Ther…